It is a good idea to create the console proxy DNS (and later configure it in VCD) otherwise those connections will be pointed at the IP address of the console proxy. (Not really an issue in a small setup) -- but as you grow you might want to bring in load balancers and that is when it helps.
Here is what I would normally suggest (if IP's and DNS are not limited)
per vCloud Instance
1x HTTP IP + friendly dns (ie, ourcloud.ourcompany.com)
1x Console IP + friendly dns (ie, console-ourcloud.ourcompany.com)
per vCloud Cell
1x HTTP IP + hostname dns (ie, cella-ourcloud.ourcompany.com)
1x Console IP + console-hostname dns (ie, console-cella-ourcloud.ourcompany.com)
You point your users at the fiendly DNS, and if you have more than one cell have it driven by a load balancer. (If you only have one cell then you do not need to have IP's for the instance you can just use the friendly names a alias records)
Hope that helps.